Originally Posted by
nhluhr
I've never used the marathon myself but would it be correct to say it's a tougher/heavier tire than the Gatorskin? Also, it has some tread on it so it may be more ideal if the OP intends to ride in various conditions like dirt/gravel, sleet, etc but it might be a slower tire than the gatorskin on clearer pavement.
I approach commuting, not from the perspective of racing but from the perspective of comfort and convenience (or perhaps, lack of inconveniences). Therefore, I would recommend going wider (for comfort) and durable/puncture-resistant, even at the cost of weight gain.